STUDY OF MORPHOLOGY AND MYCOPARASITISM OF SOME ANTAGONISTS OF TRICHODERMA SP FROM WEST BENGAL, INDIA A. Adhikari, S. Nandi, S. Dutta, I. Bhattacharya and T. Mandal) Page | 593 International Journal of Research (IJR) Vol-1, Issue-9, October 2014 ISSN 2348-6848 Study of morphology and mycoparasitism of some antagonists of Trichoderma sp from West Bengal, India A. Adhikari 1&3* , S. Nandi 2 , S. Dutta 1 , I. Bhattacharya 1 and T. Mandal 3 . 1 AICRP on vegetable crops, Directorate of research, BCKV, Kalyani, Nadia, West Bengal, India 2 Department of Plant Protection, Palli Siksha Bhabana, Visva-Bharati, Sreeniketan, Bolpur, Birbhum, West Bengal, India 3 Department of Biotechnology, O.I.S.T.,Vidyasagar University, Midnapore, West Bengal, India. *Corresponding Author e-mail: arindamadhikaribt@gmail.com Abstract: Trichoderma sp are free living that are frequent in soil and root eco system. They can contend with other organisms. Their colonies grow fast and containing tufted or pustulate, repeatedly branched conidiophores with lageniform phialides and also bearing green conidia. Rhizoctonia solani and Sclerotium rolfsii causes solemn diseases like sheath blight in rice, damping off in chilli and collar or stem rot diseases in groundnut. A total of fourteen different Trichoderma sp denoted as T1-T14 were isolated from rhizosphere of rice, chilli and groundnut on Potato Dextrose Agar (PDA) and Trichoderma Specific Medium (TSM). The micrometric measurement of phialide length (Average) and spore size (Average) was maximum in T1, T11 and T4 isolates as compared to other isolates. All isolates had been evidence for prospective antagonistic activity against all the tested fungal pathogens viz. Rhizoctonia solani(RS) and Sclerotium rolfsii(SR). The results portrayed in our study that T4 and T11 showed signs of strong antagonism against R. solani and T11 showing superior antagonistic effect against S.rolfsii after four days of incubation in dual culture. The calculated vigor index was also recorded maximum for the isolate T4 (1592). Two mylotic enzyme activity viz β-1,3 glucanase and chitinase of Trichoderma sp isolates were significantly positively correlated with the antagonistic activity of Trichoderma sp isolates.. Based on all the uniqueness of morphological miscellany of Trichoderma sp isolate, antagonistic scenery and cell wall degrading enzyme activity, Trichoderma sp isolates can be consigned to intend impending contender for enlargement in agriculture sectors. Keywords: Trichoderma sp, Bell’s Scale, Mycolytic enzymes. Introduction Rice, chilli and groundnut are one of the most widely produced and consumed crops in the world and known as protective food both because of their special nutritive value and also because of their wide spread production. Trichoderma sp take part in